Blending Yarn in the Twisting Process and its Effect on the Dynamometrical and Aesthetic Properties of the plied yarns

Document Type : Original Article

Authors

1 کلية الفنون التطبيقيه جامعة حلوان

2 city cuntry

3 spinning, weaving, and Knitting, Faculty of Applied Arts, Helwan University, Giza, Egypt

Abstract

We know that the Cotton/polyester blending process is very important and done in the drafting machines as slivers and sometimes in the opening room as a fiber but in the twisting process as a cotton yarn with polyester filament yarn (Co/Fy), this wasn´t before, therefore, this paper investigates the possibility of producing a plied blend yarns (Co/Fy) and study its mechanical properties.
Empirically in this research work we have been used: Murata high-speed double winder No. 23 machine, Toyoda Ring Twisting (RYG 812) machine, Murata cone winding machine, and a Single yarn tensile strength tester. The materials that have been used in this research work are cotton which has count Ne 30 and polyester filament which has counts 75, 180, and 400 Denier.
As a result of this investigation we have been achieved empirical prediction equations to calculate: the plied blend yarn (Co/Fy) equivalent count, blend ratio calculation, the effect of the twist factor and yarn count on the stress and on the strain, and effect of the blend ratio on the stress and on the strain as function with yarn count. From these equations: the strain increase with increasing the twist factor. The strain of the blend plied yarn decreases with increasing the twist factor and the cotton blend ratio percent. The stress of the blend plied yarn decreases with increasing the cotton blend ratio at a critical point (Co/fy 65/35) then increases with increasing the cotton blend ratio Co%. The stress of the blend plied yarn decreases with decreasing the polyester filament blend ratio Fy% at a critical point (Co/Fy 65/35) then increase with decreasing the polyester filament blend ratio. From these results can be decided that the best blend ratio is Co/Fy 65/35.
Key words: Blend plied yarn, Yarn count, Blend ratio, Stress-Strain, and Twist factor

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